diff --git a/homeassistant/components/devolo_home_control/devolo_device.py b/homeassistant/components/devolo_home_control/devolo_device.py
index 781799cbf37..03f850579be 100644
--- a/homeassistant/components/devolo_home_control/devolo_device.py
+++ b/homeassistant/components/devolo_home_control/devolo_device.py
@@ -45,7 +45,6 @@ class DevoloDeviceEntity(Entity):
         self.subscriber: Subscriber | None = None
         self.sync_callback = self._sync
         self._value: int
-        self._unit = ""
 
     async def async_added_to_hass(self) -> None:
         """Call when entity is added to hass."""